bought used car big mistake but i gotta fix it (rough idle)

2004 CHEVROLET CAVALIER

200,000 MILES

ABARRAZA94

MEMBER
1 POST
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i have replaced the spark plugs, replaced the idle air control valve, i have gone in for an oil change or tune up since i havent had much left over from my paychecks could you all possibly help
when idle w/ a/c on it over heats and dies, and w/o a/c on idle the RPM's fluxate up and down and it some times drops and dies while idle, as well as the car itself hesistates......
alot huh?

Jun 24, 2013 at 9:00 AM

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WRENCHTECH

CAR REPAIR CONTRIBUTOR
20,761 POSTS

First eliminate all vacuum or air leaks in the system and make sure the EGR valve is closing all the way and doesn't have carbon stuck in the pintle. Try cleaning the throttle body. Remove the intake snorkel, have someone hold the throttle wide open for you and scrub the back side of the throttle plate and surrounding bore with an old tooth brush and some carb cleaner. Be sure to spray some into the small holes next to the throttle plate. That should help stabilize the idle.

Jun 24, 2013 at 9:23 AM